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under the surface of the ground 地下的；地面以下的 an underground bunker/tunnel 地下掩体/隧道 underground parking 地下停车场 an underground car park 地下停车场 underground passages/caves/streams 地下通道／洞穴／溪流 underground cables 地下电缆 They carried out a series of underground nuclear tests. 他们进行了一系列地下核试验。
operating secretly and often illegally, especially against a government 秘密的，非法的，暗中的，地下的（尤指反政府的） an underground resistance movement 地下抵抗运动 The changes will affect all workers, whether underground or legal. 这些变化将影响所有地下和合法工人。 The party was originally formed as an underground organization in 1987. 该党最初是在1987年成立的地下组织。
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under the surface of the ground 地下的；地面以下的 in or into a secret place in order to hide from the police, the government, etc. 隐蔽地；隐匿地 He went underground to avoid arrest. 他隐藏起来以防被捕。 🔊🔊 If the group is outlawed they will go underground. 如果这个团体被宣布为非法，他们就会转入地下。 Opposition groups have been driven underground. 反对派团体被赶到地下。
- (often the Underground)(British English)(North American English subway)[singular]
an underground railway system in a city （城市的）地下铁路系统，地铁 
British/American underground / subway / metro / tubeunderground / subway / metro / tubecompare metro, tube- A city’s underground railway system is usually called the underground (often the Underground) in British English and the subway in North American English. Speakers of British English also use subway for systems in American cities and metro for systems in other European countries. The Metro is the name for the systems in Paris and Washington, D.C. London’s system is often called the Tube.
Extra ExamplesTopics Transport by bus and traina2I always seem to get lost in the underground. 在地铁里我好像总会迷路。 I often travel on the underground. 我经常乘坐地铁。 It brought the whole underground system to a halt. 该事件导致整个地铁系统停止运转。
Oxford Collocations Dictionaryverb + underground- go by
- go on
- take
- …
- station
- train
- tunnel
- …
- in the underground
- on the underground
- the underground[singular + singular or plural verb]
a secret political organization, usually working against the government of a country 秘密政治组织；（反政府）地下组织 - (Indian English)
a person who works against the government as a member of a secret political organization 反政府地下组织成员
